Detailed Description

The distribution

$P(x)=\frac{1}{x \sigma \sqrt{2 \pi}} \exp \left[-\frac{\left(\ln x-\mu\right)^2}{2\sigma^2}\right]$

This class is experimental.

Definition at line 475 of file prob_dens_func.h.

Public Member Functions
	prob_dens_lognormal ()
	Create a blank lognormal distribution.

	prob_dens_lognormal (double mu, double sigma)
	Create lognormal distribution with mean parameter `mu` and width parameter `sigma`. More...

	prob_dens_lognormal (const prob_dens_lognormal &pdg)
	Copy constructor.

prob_dens_lognormal &	operator= (const prob_dens_lognormal &pdg)
	Copy constructor with operator=.

void	set_mu_sigma (double mu, double sigma)
	Set the maximum and width of the lognormal distribution.

void	set_seed (unsigned long int s)
	Set the seed.

virtual double	operator() () const
	Sample from the specified density.

virtual double	pdf (double x) const
	The normalized density.

virtual double	log_pdf (double x) const
	The log of the normalized density.

virtual double	cdf (double x) const
	The cumulative distribution function (from the lower tail)

virtual double	invert_cdf (double in_cdf) const
	The inverse cumulative distribution function.

virtual double	entropy () const
	Entropy of the distribution ( $- \int f \ln f$ )

Protected Attributes
double	sigma_
	Width parameter. More...

double	mu_
	Central value. More...

rng_gsl	r
	The GSL random number generator.

Constructor & Destructor Documentation

o2scl::prob_dens_lognormal::prob_dens_lognormal	(	double	mu,
		double	sigma
	)

inline

The value of sigma must be larger than zero.

Definition at line 508 of file prob_dens_func.h.

double o2scl::prob_dens_lognormal::mu_

protected

A value of -1 indicates it is yet unspecified.

Definition at line 489 of file prob_dens_func.h.

double o2scl::prob_dens_lognormal::sigma_

protected

A value of -1 indicates it is yet unspecified.

Definition at line 483 of file prob_dens_func.h.

The documentation for this class was generated from the following file: